package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.DeleteMapping;

import java.util.ArrayList;
import java.util.List;


@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;


    /**
     * 新增菜品和对应口味数据
     * @param dishDTO
     */
    @Transactional  //要么都成功 要么都失败
    public void save(DishDTO dishDTO) {
       //转换为实体类对象
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //向菜品表插入1条数据
        dishMapper.insert(dish);
        Long dishId = dish.getId();

        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && !flavors.isEmpty()){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });


            //向口味表插入n条诗句
            dishFlavorMapper.insert(flavors);
        }

    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQury(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = (Page<DishVO>) dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());

    }

    /**
     * 批量删除
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //查看是菜品的启用状态，如果是启用状态，则不能删除
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException("该菜品已启用，不能删除");
            }
        }

        //判断菜品是否关联了套餐，如果关联了就不能删除  用动态查询
        List<Long> setmealId = setmealDishMapper.getDishIdsBySetmealId(ids);
        if (setmealId != null && setmealId.size() > 0) {
            throw new DeletionNotAllowedException("该菜品已关联套餐，不能删除");
        }

        //删除菜品表中的菜品数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteById(id);

        }


    }

    /**
     * 根据id查询菜品和对应口味数据
     * @param id
     * @return
     */
    public DishVO getByIdWhithFlavor(Long id) {
        //根据id查询菜品数据、
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        //将查询到的数据封装到VO中
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;

    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    public void updateWithFlaor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表基本信息
        dishMapper.update(dish);

        //口味表先删除再重新插入
        //先删除
        dishFlavorMapper.deleteById(dishDTO.getId());
        //重新插入
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && !flavors.isEmpty()){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });


            //向口味表插入n条诗句
            dishFlavorMapper.insert(flavors);
        }


    }

    /**
     * 启用或禁用菜品
     * @param status
     * @param id
     */
    public void startOrStop(int status, Long id) {
        Dish dish = Dish.builder()
                .status(status)
                .id(id).build();

        dishMapper.update(dish);
    }



    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }


}
